I know I'm waking up a topic here however, I currently have the SGS Large 4x4 Trolley Jack kit and I'm not happy if I'm honest.

Click image to enlarge

Sealey. Not the cheapest but a superb piece of kit that makes jacking the car rapid and effortless.

https://www.fullfatrr.com/forum/topic62782.html

Never liked the look of those small jacks with an extender as the base is too small in relation to the height to give adequate lateral stability. Maybe OK when lifting a single wheel when the other 3 are stopping any lateral movement but for raising one end from a center the risk of the whole end tipping sideways is pretty obvious. Unless you can get something pretty large I’d get a 2 jacks and lift from both sides with the bodies of the jacks 90 deg to the car sides to give max lateral support. 2012 TDV8 Vogue (L322)

In reality I think the SGS will end up being a secondary jack. The wheels also get stuck, which causes issues when raising and lowering (with the boat is a problem because it doesn't lower it back centre.

Any recommendations JayGee? The other one I've seen mentioned on here I think is Hawk. 2015 Range Rover Autobiography 4.4 SDV8

I’d try adding some washers to one of the rear wheel mounts to level it and then buy another jack to use as a pair unless like me you only intend to lift one wheel at a time. I’d be a bit worried if the wheels are not turning though as this is an essential part of it’s safe operation. SGS products do look cheap but not sure cheap is what you want when playing with the weight of an L322….. 2012 TDV8 Vogue (L322)